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Finding the Fourth Proportional to 937.04, 1,293.36 and 642.20

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Solution

The fourth proportional to 937.04, 1,293.36 and 642.20 is: 886.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    937.04 : 1,293.36 = 642.20 : x
  2. Step 2: Convert to fraction form
    937.04/1,293.36 = 642.20/x
  3. Step 3: Cross multiply
    937.04x = 1,293.36 × 642.20
  4. Step 4: Simplify right side
    937.04x = 830,595.79
  5. Step 5: Solve for x
    x = 830,595.79/937.04
  6. Step 6: Final answer
    x = 886.40

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.